PCA9516A_3

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 03 — 23 April 2009

3 of 19

NXP Semiconductors

PCA9516A

4.

Block diagram

A more detailed view of Figure 1 buffer is shown in Figure 2.

The output pull-down of each internal buffer is set for approximately 0.5 V, while the input

threshold of each internal buffer is set about 0.07 V lower, when the output is internally

driven LOW. This prevents a lock-up condition from occurring.

Fig 1.

Block diagram

PCA9516A

002aae616

SCL0

SDA0

EN4

SCL1

SDA4

SDA1

SCL4

EN1

EN3

SCL2

SDA3

SDA2

SCL3

GND

BUFFER

BUFFER

BUFFER

HUB

LOGIC

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

HUB

LOGIC

BUFFER

BUFFER

EN2

Fig 2.

Buffer detail

002aac531

to output

in

inc

data

enable